%0 Journal Article
%T Progress on biodegradation of polylactic acid——A Review<br>聚乳酸(PLA)生物降解的研究进展
%A Fan Li
%A Sha Wang
%A Weifeng Liu
%A Guanjun Chen
%A <br>李凡
%A 王莎
%A 刘巍峰
%A 陈冠军
%J 微生物学报
%D 2008
%I 
%X Polylactic acid is a high molecular-weight polyester made from renewable resources such as corn or starch. It is a promising biodegradable plastic due to its mechanical properties, biocompatibility and biodegradability. To achieve natural recycling of polylactic acid, relative microorganisms and the underlying mechanisms in the biodegradation has become an important issue in biodegradable materials. Up to date, most isolated microbes capable of degrading polylactic acid belong to actinomycetes. Proteases secreted by these microorganisms are responsible for the degradation. However, subtle differences exist between these polylactic acid degrading enzymes and typical proteases with respect to substrate binding and catalysis. Amino acids relative to catalysis are postulated to be highly plastic allowing their catalytic hydrolysis of polylactic acid. In this paper we reviewed current studies on biodegradation of polylactic acid concerning its microbial, enzymatic reactions and the possible mechanisms. We also discussed the probability of biologically recycling PLA by applying highly efficient strains and enzymes.
%K polylactic acid
%K microbial degradation
%K enzyme
%K degradation mechanism
%K biological recycling
%K treatment of plastic wastes<br>聚乳酸(PLA)
%K 微生物降解
%K 酶
%K 降解机制
%K 生物处理系统
%K 聚乳酸
%K 生物降解机制
%K 研究进展
%K polylactic
%K acid
%K biodegradation
%K Progress
%K 废弃
%K 系统处理
%K 阐述
%K 分子生物学
%K 酶学
%K 微生物学
%K 相关
%K 循环利用
%K 材料
%K 环境友好
%K 生物塑料
%K 绿色
%K 毒害作用
%K 生物可降解性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=A3C6BA55AB623B90FA9104CFFC826F3C&aid=F47E07B2F10733931E857C89E84610CD&yid=67289AFF6305E306&vid=B6DA1AC076E37400&iid=0B39A22176CE99FB&sid=30897FA31CA3354D&eid=DC330B09A33F1455&journal_id=0001-6209&journal_name=微生物学报&referenced_num=2&reference_num=38